It Came From Red alert! is a mod that brings the original Command & Conquer: Red Alert into Red alert 2: Yuri's Revenge. All versions require Red alert 2: Yuri's Revenge V1.001. The current, and likely final, version is Pre-release Candidate 1 (PRC1) which does not require any additional community patches.
The mod originally started as a coding-only mod so that I could play something resembling Red Alert with the newer interface features like right click scrolling and turned into something way beyond that. It's been consistently popular since the first version was released with a steady trickle of views and downloads even to this day.
Thank you all for the kind comments the mod has received over the years and I'm sorry I never managed to finish it, especially as it got so close to being totally done.